[patch] Fix ICE in rtl_for_decl_init

[Eric Botcazou]

Hi,

the attached testcase causes the compiler to ICE in rtl_for_decl_init when it 
is trying to generate debug info for the constant C.  The INIT expression is
  NOP_EXPR<const type> (VIEW_CONVERT_EXPR<type> (CONSTRUCTOR))
with type a scalar type.  The code in rtl_for_decl_init already knows how to 
skip aggregate types, but it doesn't see the inner CONSTRUCTOR.

Bootstrapped/regtested on x86_64-suse-linux, OK for the mainline?


2010-12-15  Eric Botcazou  <ebotcazou@adacore.com>

	* dwarf2out.c (rtl_for_decl_init): Strip no-op conversions off the
	initializer.  Skip view conversions from aggregate types.


2010-12-15  Eric Botcazou  <ebotcazou@adacore.com>

	* gnat.dg/unchecked_convert8.ad[sb]: New test.


-- 
Eric Botcazou
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